In school, Momoko, Yuri and Hinagiku are having a contest as to who can make the nicest scarf for Kazuya. Hinagiku tries to boast that she is doing a very beautiful scarf but is discovered by Momoko and Yuri to have been making a rather ugly scarf which is not finish yet. Yousuke comes by to their classroom to borrow some money from Momoko. When Hiromi saw this, she gets jealous so tries to destroy Momoko's scarf by unwinding it but Yuri, Hinagiku and the other girls catch her in the act. Hiromi made some alibi and quickly runs off.
The girls decide to meet in a room to knit their scarf. Hiromi wants to be in and decide to cause trouble by calling Puso-devil [ forgot what this thing looks like -- I think like a pair of scissors]. In the room, two girls [girl A and B] notice a new door. They open it and they were trapped in a different dimension - field. Hinagiku and another girl C also see the new door and both are also brought in another dimension - sea. In each place the two pair of girls go, there is a door and when they open it, they are brought to another place again. When Momoko and Yuri went into the room and noticed the door, Jamapi tells them that it is the work of Puso-devil and the door leads to different places. Yuri suggests that they use a long thread to keep track of where they are going since it will be like going to a maze and with the use of the thread, they will remember how to get out of the Puso-devil's door.
Momoko decides to unwind the yarn from her knitted scarf. They tie the yarn to a table and goes in the door. Jamapi unwinds the scarf as they walk while the two girls call out to Hinagiku and the others. Hiromi discovers the yarn and decides to follow the yarn. Meanwhile, Momoko and Yuri find the girl A and B then, tell them to follow the yarn to get out. Momoko's yarn is all used up so they decide to use Yuri's yarn which Jamapi unwinds from Yuri's scarf. Hiromi sees that girl A and B are escaping with the help of the yarn so she decides to cut it.
Yuri and Momoko find girl C and tell her to find the way out with the use of the yarn. Then, they find Hinagiku freezing in the snow. Jamapi then notices that someone is tugging at the yarn. Hiromi who already transformed to Potamosu and Puso-devil cannot cut the yarn and get themselves electrocuted. The three girls discovers that the yarn cannot be easily cut because it is strengthen by their friendship. They quickly transform and find the culprits. They send Puso-devil to happy land as Potamosu escapes.
Back in the room, Momoko and the others wake up girl A, B and C. The three girls tell them about something bad has happened but Momoko and others just tell them that they are just dreaming. On the way home, Yuri and Momoko are sad because they have unwind their scarfs for Kazuya and are left with some balls of yarn. Kazuya walks by and asks if he can have the balls of yarn for his cat. Momoko and Yuri are happy to give it to him. Kazuya then promises to replace them tomorrow as he runs off. Hinagiku is not able to show her scarf to him because it looks terrible and just asks Momoko and Yuri to teach her how to make a nice one.